Due to its extremely high theoretical capacity and lowest potential, lithium metal is considered the most ideal metal battery anode. However, many problems hinder its practical use, such as reduced life due to dendrites and large volume expansion for growth during lithium plating / stripping. At high currents, these challenges will become even greater. Due to its excellent electrical conductivity, fast ion transmission, and simple preparation, Ti ₃ C ₂MXene has been extensively studied. Theoretical and experimental results show that Ti ₃ C ₂ has a conductivity of up to 2400 S cm ^-1 and a low lithium ion diffusion barrier of 0.07 eV . Based on this, high-performance Ti ₃ C ₂supercapacitors and battery performance have been reported.  

Achievements

     Tianjin University of Luojia Yan Jiaoshou and Chong Min Koo well-known in the international journal Angewandte Chemie published entitled "MXene Aerogel Scaffolds for High-Rate Lithium Metal Anodes" papers. For the first time, the work of MXene aerogels for lithium metal anodes was explored. With high metal electronic conductivity, fast lithium ion transport capacity, and abundant lithium nucleation sites, this scaffold can exhibit high cycle stability and low overpotential up to 10 mA cm ^-2 .

Figure 1  MXene aerogel as a lithium metal anode .

Figure 2 Preparation of MXene aerogel .  

Figure 3  Chemical composition of MXene aerogel .

Figure 4  Electrochemical Properties of MXene Aerogel .

in conclusion

In summary, a 3D porous Ti ₃ C ₂ MXene aerogel is proposed as a scaffold for high-rate lithium anodes. With high metal electronic conductivity, fast lithium ion transport capacity, and abundant lithium nucleation sites, this scaffold can exhibit high cycle stability and low overpotential up to 10 mA cm ^-2 . This work hasexplored a new way for preparing a new type of lithium battery anode with a high energy density lithium battery that is not a 2D material.

Original link:

https://onlinelibrary.wiley.com/doi/abs/10.1002/ange.201808714

Source: MXene Academic